But grenadiers are currently balance with Tommies/Riflemen/Cons
I would say vanilla tommies slightly overperform vs. vanilla grens in a vacuum when reinforce cost is taken into account, but then again ostheeer has snipers and turbo mortars (in annoy vacuum) so it's pretty much fine (especially since both are effective against brits). Another thing to note is that tommies lack a snare or usable grenade and are garbage on the move. Kinda ended up contradicting my original point at the end but whatever.
Actually one can if one keeps in mind the other aspect as well.
Mainline infantry should be comparable not equal.
For instance Riflemen where designed as infantry that is OP because their support weapons where UP. Since the latest patches tented to improve the cost efficiency of USF support weapons Riflemen need to become a bit less OP.
For instance by moving smoke to officers or elite infantry and/or removing the lasting disabling affect on vehicle weapons.
Lol Thompson paras and rangers with smoke would be batshit op. IMO officers with smoke would be too little smoke (especially because you usually only have 2). I think if officers and REs had smoke it'd probably be fine. I don't think it disables vehicle weapons though, only slows their move speed (only being somewhat of a misnomer)